John Marino has pointed out, with a number of examples, that gnat-aux is the best pkgsrc-based compiler for DragonFly right now, in terms of compatibility and support.  It’s certainly good news if you are an Ada programmer.  He lists some interesting numbers to demonstrate this superiority, though you can’t buildworld with it yet.  (gcc 4.4, on DragonFly as part of the system, will do this normally.)